Loom attachment



May 30, 1939. J. E. M CARVEY LOOM ATTACHMENT Filed July 17, 1937 Patented May 30, 1939 UNITED STATES EATENT OFFIQE LOOM ATTACHMENT Julius Edward McCarvey, Griffin, Ga.

Application July 17, 1937, Serial No. 154,312

Claims. (01. 139-187) Generically this invention relates to looms but more particularly it is directed to the protection mechanism of the loom.

One of the principal objects of this invention 5 is the provision of a mechanism of the above character controlling the movement of the protection rod designed to take the tension off of said rod at the proper time to reduce strain on the picker stick during picking of the shuttle from the box and to put tension on the protection rod at the proper time to catch the shuttle as it enters the box.

Another important object of this invention is the provision of a mechanism of this character 5 adapted to eliminate the conventional protection rod springs and to allow free movement of the protection rod in its bearings without spring tension on said rod, thereby reducing wear on the rod and its bearings.

2 In loom construction it has heretofore been prevalent to have a contact arm rigidly mounted on the protection rod and a lever carried by the pitman arm adapted to intermittently move said contact arm in one direction, thereby turning the protection rod against the action of the protection spring having one end connected to said rod and the other to the lay of the loom, movement of the contact arm in the opposite direction being by the tension of said spring and whereby said contact arm opens the shuttle box but does not close it, therefore one of the principal objects of this invention is the elimination of such spring action in operating said contact arm and the prov vision of means whereby said contact arm is positively moved in both directions to open and close the box, that is, control the protection rod and binder tension with respect to the shuttle in entering' and leaving a box.

Another important object of this invention is the provision of a mechanism for controlling the movement of the protection rod having no spring action between the protection rod and lay of the loom and having an oscillating arm cooperating with and adapted to operate the contact arm carried by the protection rod to positively control its movement in both directions and a resilient connection between the rod and contact arm moveably mounted on the arm constituting a connecting medium rather than a spring tensioning element to effect movement of the protection rod as heretofore prevalent.

With these and other objects in view, which will become apparent as the description proceeds, the invention resides in the construction, combi- 55 nation and arrangement of parts, hereinafter more fully described and claimed, and illustrated in the accompanying drawing, in which like characters of reference indicate like parts throughout the several figures, of which:

Fig. 1 is a plan view of a portion of the lay. 5

Fig. 2 is a section on the line 22 of Fig. 1.

Fig. 3 is a cross section on the line 3-3 of Fig. 2.

Fig. 4 isa plan view of the'protection rod and associated parts with the spring partially broken away. 10

Fig. 5 is a cross section on the line 5-5 of Fig. 4.

Fig. 6 is a section on the line 66 of Fig. 1.

The protection rod mechanisms with which I am familiar have proven deficient in many re-, spects, some of which are the conventional protection rod spring connected to the lay and to the protection rod for, exerting a continuous pressure in one direction on the protection rod, and means rigidly connected to the rod and coacting with, .20 means carried by the pitman for moving the rod" in one direction, said spring adapted to move it in the opposite direction, and which mechanism has proven deficient in many respects, and it was to overcome such deficiencies and to provide a 25 simple means of controlling said rod and the shuttle binders including a contact arm connected to a loose sleeve mounted on the protection rod having a resilient connection between the sleeve and rod, and a collar rigidly connected to 30 the rod having a cutout portion cooperating with a complemental projection on the moveable sleeve, and an oscillator arm connected to the pitman cooperating with said loose sleeve con-- .tact arm adapted by reason of said sleeves posi- 35 tive action with respect to said collar to turn the" projection rod to control the shuttle binders as the shuttle enters and leaves the shuttle box, said moveable sleevehaving limited movement on said protection rod so as to reduce to a minimum thaAO rotative movement of the rod during operation of the loom, thereby reducing wear on bearings and binders, lightening the load of the driving mechanism and effecting a positive control movement of said protection rod, that I designed the protection rod control mechanism forming the subject matter of this invention.

In the illustrated embodiment characterising this invention there is shown a lay I, sword 2, binder 3, shuttle box 4, shuttle 5, picker stick 6, protection rod binder finger l, pitman 8, crank shaft 9, and protection frog Id, of conventional construction, as is well known in the art.

Sword 2 is suitably connected adjacent its upper end to lay l and is formed with spaced cars ll connected by pin I2 on which is journaled at one end pitman 8 formed from a wood piece l3 or other suitable material bound by a metallic strip l4 secured thereto by bolts l5 as will be apparent, the loop ends of said strip I4 constituting bearings for the pin l2 and crank shaft 9 suitably connected to a driving means not shown. Extending laterally from one of the ears H and in parallelism with lay l is a projection IE to which is secured bearing member I1 by bolt I8 extending therethrough and through the lay l. Protection rod l9 suitably journaled in said hearing 11 extending in parallelism with lay I- is formed at one end with a right angle projection 20 on which is suitably mounted protection rod binder finger 1 secured by set screw 2|, said finger adapted to engage binder 3 which coactswith shuttle 5 in the conventional manner. Spaced inwardly from projection 20 protection rod I8 is formed with a right angle projection constituting dagger 22 extending in an opposite direction to projection 20 and, when the shuttle is not properly in the box, adapted to make contact with projection frog l0 suitably connected to the side of the loom to stop the loom, as will hereinafter more fully appear.-

Mounted on protection rod [9 spaced from dagger 22 is the stationary collar 23 adjustably secured by set screw 24, one end face of said collar being formed with a cutout portion 25, and mounted on said rod adjacent said collar is a loose sleeve 26 formed with contact or cam arm 21 extending in an opposite direction with respect to dagger 22, as will be well understood. The end face of loose sleeve 26 is formed with a projection 28 adapted to engage in cutout portion v25 so that shoulder 29 will be normally spaced from shoulder 30 of collar 23, said moveable sleeve being normally held in contact with the opposite shoulder of said collar by coil spring 3| mounted on protection rod 19 and having one end extending through arm 21 as at 32 and the opposite end extending through. opening 33 in flange portion 34 or end of tension collar 35 mounted on protection rod I9 and adjustably secured to said rod by set screw 36 to effect the desired tension of spring 3|.

Suitably mounted on end of pitman 8 is the offset oscillator arm 31 formed with lateral spaced projections 38 adapted to engage said pitman and prevent twisting of said arm therewith, and secured to said arm by bolt 39 extending through said arm and slot 39', said arm 31 having an offset portion 40 formed with a horseshoelike opening 4| in its end adapted to receive the cam or contact arm 21 and terminating in the cam fingers 42 and 43 adapted to contact opposite sides of said arm 21, and by means of which,

, movement of protection ro'd I3 is controlled, as

tion is designed to control the entire movement of the protection rod doing away with the mm ventional springs, there being no tension on said rod except during forward stroke of the lay I when the loom crank shaft is turning. from back through bottom center toward front During this movement the lower finger 43 of oscillator arm 31 engages the under side of cam 21 of loose sleeve 26, thereby exerting pressure center.

on protection rod [9 and binder finger-1 against binder 3 through resilient connection 3|. If the shuttle is properly in the box then the loose sleeve 26 is allowed to turn on the protection rod through spring connection 31, and the tension is gradually increased as the crank shaft moves from back center downward to front center through pressure of said finger 43 of the oscillator arm 31 against the bottom of cam 21. During the backward movement of the lay when crank shaft is at top center downward pressure is exerted by finger 42 of oscillator arm 31 on cam 21, the portion 28 engaging shoulder 38 opposite, to shoulder 30 of cut out portion 25 in stationary collar 23 forcing the protection rod to turn and taking all protection rod pressure off of the binder and the shuttle. This movement is positive inasmuch as the stationary collar 23 is fastened to the protection rod and when the shuttle is in the box the portion 28 has sufhcient play to permit loose sleeve 26 to move on said rod without turning the rod. However, when the shuttle is not properly in the box the loose sleeve 5 through spring connection 3! will turn the protection rod [9 forcing dagger 22 to frog l0 and stop the loom, since there is nothing to hold said rod from turning, the spring simply acting as a connecting medium between the rod and loose sleeve.

It has heretofore been prevalent in loom construction to include the protection rod spring mounted on the rod having one end connected thereto and the other'to the lay so that this spring at all times exerted a tension on the rod and any movement of the rod was of necessity against the tension of the spring, said spring acting to principally control the protection rod, binder finger and associated parts, and their action on the shuttle entering and leaving a box. This construction not only required a large power consumption, but caused excessive wear of the rod, bearings, and associated mechanism, and in addition it will be observed that such structural arrangement was detrimental to the smooth operation of the protection rod and control mechanism and did not constitute a positive control of the protection rod in both directions, since the oscillatorarm or contact element could only control the 'rod in one direction.

It will thus be apparent that applicant has designed a protection rod control mechanism wherein the protection rod has no connection with the lay other than the bearings to hold it in place, the entire control being centered in the oscillator arm and associated parts carried by the rod, the latter comprising a stationary collar having a cut out portion and a loose sleeve having a projection engageable in said cut out portion and formed with a cam arm engageable with said oscillator arm'and operable in both direce tions thereby, said loose sleeve having a resilient connection with a stationary element secured to said rod adapted to maintain the projection carried by the loose sleeve in contact with one end of the cut out portion in the stationary collar, said spring constituting a connecting medium between the loose sleeve and rod. At no time during the cycle of operation does the spring have to act to turn the rod, the rod being positively turned by the, action of the oscillator arm in an upward or downward direction with respect" to the loose sleeve cam arm, the spring permitting the oscillator arm to turn the sleeve on the rod without turning the rod when the shuttle is properly in the box, whereby it will be observed that the above structural arrangement eliminates conventional protection rod springs, requires little attention when once installed, reduced power requirements, eifects smoother running of the loom by removing the strain from the mechanism of the loom, contributes to higher loom speed, yet is simple in construction, manufacturable at a minimum cost, and efiicient for the purposes intended.

Although in practice I have found that the form of my invention illustrated in the accompanying drawing and referred to in the above description as the preferred embodiment, is the most efficient and practical; yet realizing the conditions concurrent with the adoption of my invention will necessarily vary, I desire to emphasize that various minor changes in details of construction, proportion and arrangement of parts, may be resorted to Within the scope of the appended claims without departing from or sacrificing any'of the principles ofthis invention. I

Having thus described my invention, what I desire protected by Letters Patent is as set forth in the following claims:

1. The combination with the reciprocatory pitman, rockable lay, and rotatable protection rod of a loom, said rod carrying a dagger and being devoid of the usual tensioning spring, of means for controlling the movement of said rod, said means comprising a movable sleeve having a cam arm mounted on said protection rod and having a flexible connection with said rod, stationary means mounted on said rod limiting the rotative movement of said sleeve, and means carried by said'pitman co-acting with said cam arm to eifect positive and intermittent movement of said cam arm and rod in opposite directions during the cycle of movement of said pitman.

2. The combination with the reciprocatory pitman, rockable lay, and rotatable protection rod of a loom, said rod carrying a dagger and being devoid of the usual tensioning spring, of means for controlling the movement of said rod, said means comprising a cam arm having a clutch face rotatably mounted on said rod and having a resilient connection therewith, stop means having a complemental clutch face rigidly mounted on said rod the clutch face of which coacts with that of said cam means,'and means carried by said pitman co-acting with said cam to effect positive movement of said cam and rod in one direction during a predetermined portion of the cycle of movement of said pitman and movement of said cam and rod in the opposite direction during another portion of said cycle of movement of said pitman.

3. The combination with the reciprocatory pitman, rockable lay, and rotatable protection rod of a loom, said rod carrying a dagger and being devoid of the usual tensioning spring, of means for controlling the movement of said rod, said means comprising a moveable sleeve having a cam arm mounted on said protection rod and having a flexible connection with said rod, stationary means mounted on said rod limiting the rotative movement of said sleeve, and means carried by said pitman co-acting with said cam arm to effect positive and alternate movement of said rod in opposite directions during predetermined portions of the cycle of movement of said pitman, and movement of said sleeve only, during a portion of said cycle of movement, whereby during such movement of the sleeve the rod remains stationary.

4. The combination with the reciprocatory pitman, rockable lay, and rotatable protection rod of a loom, said rod carrying a dagger and being devoid of the usual tensioning spring, of means for controlling the movement of said rod, said means comprising a movable sleeveformed with a cam arm mounted on said protection rod and having a flexible connection with said rod, stationary means mounted on said rod, co-acting with said sleeve, and means carried by said pitman coacting with said cam to effect interlocking engagement of said moveable sleeve and stationary means to rotate said rod in one direction during a portion of the cycle of movement of said pitman, said means co-acting with said cam arm to effect movement of said arm and rod in the opposite direction duringa different portion of the cycle of movement of said pitman, said stationary means adapted to permit such co-acting means to move said cam arm and sleeve with respect to said rod without moving said rod during another portion of the cycle of movement of said pitman.

5. The combination with the reciprocatory pitman, rockable lay, and rotatable protection rod of a loom, said rod carrying a dagger and being devoid of the usual tensioning spring, of means 'member and rod in one direction during one portion of the cycle of movement of the pitman and rotate said rod to operatively position said dagger during another cycle of movement.

JULIUS E. MCCARVEY. 

